Handheld PC (HPC) was a thing in the 90-ies as well with some great hardware such as the Psion 5. Eventually the acronym was "stolen" to mean High Performance C

Handheld PC (HPC) was a thing in the 90-ies as well with some great hardware such as the Psion 5. Eventually the acronym was "stolen" to mean High Performance Computing. I absolutely loved my Psion.